You need to follow order of operations.
So, first you add 5 and 12 which gives you 17
Next, you would multiply 17 by 2 and get 34
Your next step is too add 34 to 3 and get 37
Then, you would multiply -4 by 37 and get -148
Next, you subtract 148 from 2 and get -146
You final step is to multiply -146 to -7
This gives you your final answer of 1168
Hope this helped :)
